/* * Copyright (c) 1985, 1991 Peter J. Nicklin. * Copyright (c) 1991 Version Technology. * All Rights Reserved. * * $License: VT.1.1 $ * Redistribution and use in source and binary forms,  with or without * modification,  are permitted provided that the following conditions * are met:  (1) Redistributions of source code must retain the  above * copyright  notice,  this  list  of  conditions  and  the  following * disclaimer.  (2) Redistributions in binary form must reproduce  the * above  copyright notice,  this list of conditions and the following * disclaimer in the  documentation  and/or other  materials  provided * with  the  distribution.  (3) All advertising materials  mentioning * features or  use  of  this  software  must  display  the  following * acknowledgement:  ``This  product  includes  software  developed by * Version Technology.''  Neither the name of Version  Technology  nor * the  name  of  Peter J. Nicklin  may  be used to endorse or promote * products derived from this software without specific prior  written * permission. * * THIS SOFTWARE IS PROVIDED BY VERSION TECHNOLOGY ``AS IS''  AND  ANY * EXPRESS OR IMPLIED WARRANTIES,  INCLUDING,  BUT NOT LIMITED TO, THE * IMPLIED  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL  VERSION  TECHNOLOGY  BE * LIABLE  FOR ANY DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, * OR  CONSEQUENTIAL DAMAGES   (INCLUDING,   BUT   NOT   LIMITED   TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;  LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF  LIABILITY,  WHETHER  IN  CONTRACT,  STRICT LIABILITY,  OR  TORT * (INCLUDING NEGLIGENCE OR OTHERWISE)  ARISING  IN ANY WAY OUT OF THE * USE OF THIS SOFTWARE,  EVEN  IF  ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * Report problems and direct questions to nicklin@netcom.com * * $Header: usage.c,v 4.2 91/11/25 19:44:59 nicklin Exp $ * * Author: Peter J. Nicklin *//* * usage() places a usage error message on the standard error * output stream stderr. */#include <stdio.h>#include "null.h"extern char *PGN;			/* program name */usage(m)	char *m;			/* usage error message */{	fprintf(stderr, "usage: ");	if (PGN != NULL && *PGN != '\0')		fprintf(stderr, "%s ", PGN);	fprintf(stderr, "%s\n", m);}